The GT-104 is optimized for "4 Ohm" speakers. Why do we put 4-Ohm in quote marks? Because 4 Ohm speakers often exhibit even lower impedances. The GT-104 is optimized to handle these speakers with grace.
It will deliver 60 Watts per channel into 4 Ohm loads. It delivers a bit more than 30 Watts per channel into 8 Ohm loads. It's all done with very low noise and very low distortion.
You can download and print the GT-104 assembly manual for free. However, we're now making available a printed version of the manual. It's 56 pages, printed on 80 pound coated stock, in full color. It's only $9.95 if you order it along with the GT-104. If you order it separately, we have to add in $8.00 for shipping, for a total of $17.95. Choose the option you want above. You can also choose the $9.95 option if you're ordering something big like a GT-102 or a PR-101, where it's big enough to drop it into the box and keep it in good shape.
This is for the GT-104 Stereo Amplifier in Assembled and Tested form. Once you place your order, we'll put you on the build plan. Typically, it takes 2 weeks from receipt of your order until your amplifier is shipped. This interval changes, however. We'll send you an email upon receipt of your order with an expected ship date.
The GT-108 is optimized for "8 Ohm" speakers. Why do we put 8-Ohm in quote marks? Because 8 Ohm speakers often exhibit even lower impedances. The GT-108 is optimized to handle these speakers with grace.
It will deliver 50-60 Watts per channel into 8 Ohm loads. It's all done with very low noise and very low distortion.
You can download and print the GT-108 assembly manual for free. However, we're now making available a printed version of the manual. It's 56 pages, printed on 80 pound coated stock, in full color. It's only $9.95 if you order it along with the GT-108. If you order it separately, we have to add in $8.00 for shipping, for a total of $17.95. Choose the option you want above. You can also choose the $9.95 option if you're ordering something big like a GT-102 or a PR-101, where it's big enough to drop it into the box and keep it in good shape.
This is for the GT-108 Stereo Amplifier in Assembled and Tested form. Once you place your order, we'll put you on the build plan. Typically, it takes 2 weeks from receipt of your order until your amplifier is shipped. This interval changes, however. We'll send you an email upon receipt of your order with an expected ship date.
You can download and print the GT-102 assembly manual for free. However, owing to persistent demand, we're now making available a printed version of the manual. It's 52 pages, printed on 80 pound coated stock, in full color. It's only $9.95 if you order it along with the GT-102. If you order it separately, we have to add in $7.00 for shipping, for a total of $16.95. Choose the option you want above. You can also choose the $9.95 option if you're ordering something big like a GT-102 or a PR-101, where it's big enough to drop it into the box and keep it in good shape.
The GT-102 is the successor to the popular GT-101. Compared to the GT-101, the GT-102 has a few refinements:
This is a complete, from the ground up, Stereo Power Amplifier Kit. Just add solder and your assembly skill to make the sweetest sound you'll ever build. For a more complete description visit the Akitika Website which features the GT-102. Like all our kits it comes with a great step-by-step manual. Unlike the updatemydnaco kits, you don't need any old hardware as a basis. Everything that you need to build a great sounding power amp, except the solder, comes in the kit. We will quote shipping options and costs for orders outside the 48 contiguous states.
The Z4 version of the GT-102 is optimized for "4 Ohm" speakers. Why do we put 4-Ohm in quote marks? Because 4 Ohm speakers often exhibit even lower impedances. The Z4 is optimized to handle these speakers with grace. If you have 8-Ohm speakers, we think you will get the best results with the original GT-102. If you have 4-Ohm speakers, then the Z4 version of the GT-102 is the one for you!
You can download and print the GT-102 assembly manual for free. However, owing to persistent demand, we're now making available a printed version of the manual. It's 52 pages, printed on 80 pound coated stock, in full color. It's only $9.95 if you order it along with the GT-102. If you order it separately, we have to add in $7.00 for shipping, for a total of $16.95. Choose the option you want above. You can also choose the $9.95 option if you're ordering something big like a GT-102 or a PR-101, where it's big enough to drop it into the box and keep it in good shape.
You can download and print the Z4 version of the GT-102 assembly manual for free. However, owing to persistent demand, we're now making available a printed version of the manual. It's 52 pages, printed on 80 pound coated stock, in full color. It's only $9.95 if you order it along with your Z4 GT-102. If you order it separately, we have to add in $7.00 for shipping, for a total of $16.95. Choose the option you want above. You can also choose the $9.95 option if you're ordering something big like a GT-102 or a PR-101, where it's big enough to drop it into the box and keep it in good shape.
Some folks are looking for a great sounding power amp, but don't have either the time or the inclination to build it themselves. For those people, we're making available assembled and tested versions of the GT-102. Need a custom configuration? Send us an email, and we'll send you a quote.
Note that the volume control shown in the picture above is not included in the standard GT-102 kit.
Most times, the GT-102 is used with a preamplifier. However, a small but growing group are dedicating a GT-102 to a CD player. In many cases, the CD player doesn't have a volume control, so adding the volume control to the GT-101 makes great sense. This kit has a quality stereo volume control, shielded cable, and an attractive knob. Installing the kit requires you to drill a hole in the front panel of your GT-102. Here's the Installation Manual for the volume control kit.
The GT-102 (original and Z4 versions, and GT-104 and GT-108) is a very quiet power amplifier. Electrically, it's so quiet that the main thing you might hear is the mechanical vibration of the power transformer. Even that is still quite quiet, except for when a rare combination comes together
My local power is very symmetric so I've never seen the problem. A few rare customers have reported a time-varying mechanical buzz from the toroidal power transformer. This arises when someone on your local piece of the power grid draws asymmetric load currents. That creates a DC bias on the incoming AC power line. The AC power line isn't supposed to have any DC at all. The toroidal power transformer reports DC on the power line by softly buzzing.
You can install the DC scraper kit to quiet the buzz. It works by removing the DC component of the input power, leaving just the AC that all transformers love. So, even if your neighbors (or you yourself) have a heat pump or air-conditioner that draws nasty asymmetric currents when it runs, you can Scrape away all the DC, and keep your transformer quiet. Installation and building is quick and easy, but it does require you to add two holes to the GT-102 chassis. Order your DC Scraper today, and ban the buzz. You can download the manual here.
Selling separate components began when a customer wanted to build a seven channel amplifier. He bought 7 amplifier modules, 3 power supply regulators, and 3 power transformers. The light-bulb over my head went on...Maybe lots of other DIY'ers would like to build special amp configurations in their own custom enclosures. By offering the modules and parts, everyone wins.
Assembly directions and schematics for the components may be found in the appropriate subsections of the GT-101 Assembly manual.
The kit includes circuit boards and parts to build a stand-alone amplifier module.It even includes thermal grease and mounting hardware, but it does not include a power supply, solder, or heat sinks. The recommended power supply voltage is a single 72 Volt DC supply. With a regulated 72 volt supply, the AMP01 delivers more than 50 Watts into an 8 Ohm load and considerably more power into 4 Ohm loads.
This is the same amplifier module used in the GT-101 Power Amplifier. It features top quality components throughout...an FR4 circuit board, a huge 10,000 uF output capacitor, 1% and 0.1% metal film resistors,with film and COG capacitors in the signal paths.
This is a kit...you'll get the parts and the PCB. You must assemble it to get the completed module pictured above!
Assembly directions and schematics for the components may be found in the appropriate subsections of the GT-101 Assembly manual.
Note that this kit is currently supplied with the NTE7197, which is NTE's private labeled version of the LM3886.
This linear regulator produces 72 Volts of quiet, clean, well regulated DC at 3.5 Amps DC, with more current available on a transient basis. All it needs is an appropriate transformer like the XFMR101 and a heatsink. The bridge, input, and output filter caps are all built in. Built-in safety features include a slow-start and current limiting fold-back that still allows high transient currents. Experts can void the warranty and modify the circuit to change the output voltage and current. The less adventurous can use it just like it is, and get great results.
This is the power supply module from the GT-101 and the GT-102. It features top quality components throughout...an FR4 circuit board, 1% and 0.1% metal film resistors for precise output voltage, and a big, beefy mosfet as the pass element in the regulator. It even includes heat sink compound, mounting brackets, and hardware. (Soup bowl not included).
Assembly directions and schematics for the components may be found in the appropriate subsections of the GT-102 Assembly manual.
This large heatsink comes pre-drilled with 6-32 holes to accept either the AMP101 or a PSR101 module. It also has 6-32 mounting holes in the bottom that accept 6-32x3/8" screws to allow easy mounting on a chassis. The heatsink dimensions are 5.375"x 3.5" x 1.38". The distance between the bottom flange mounting holes is 3.875". This heatsinks is used in the GT-101.
This beefy toroidal transformer, made by Avel Lindberg (part number Y236654) comes with mounting hardware. Its dual primaries can be wired for either 120V or 240V operation. It has two secondaries, making it suitable for single output or split supplies. With both secondaries in series, it produces about 106 VDC into a lightly loaded bridge rectifier arrangement. In a split supply it produces (lightly loaded) about +/-53 Volts. Avel Lindberg quotes the secondaries as 35-0-35 Volts RMS.
THE EE-101 is a stand-alone version of the PHONOZ phono section. It includes a regulated power supply, an internal toroidal power transformer, a fused IEC power entrance connection, and a volume control. Like the GT-102 power amplifier, it includes a steel wall between the power supply and signal processing sections to drive down the noise.
If LP's are your passion this takes the place of a full preamp. Just combine it with your power-amp, turntable (moving magnet cartridge), and speakers, for some of the best sound you'll ever hear. Because it has the PHONOZ phono section, you get:
It's available as a complete kit for $279 plus $15 shipping (48 states). You can buy stand-alone phono preamps starting at $20 and running all the way up to $10,000. My belief is that this combination of performance, price, and features hits a sweet spot.
You can download the EE-101 Assembly manual
Note that the gold-plated input conectors shown in the picture above are now included in the standard GT-102 kit.
We offer gold-plated input jacks here in the Akitika store in case:
These connectors are gold plated. In addition, they have a handy hex on both sides. This makes it easy to tighten the connector in place. It also comes with insulating washers. If you replace the stock input connectors from an older GT-101 with this item, you should also swap out the stock insulating washers that come with the GT-101.
Your order contains two gold-plated chassis-mount RCA input connectors, one with a red id band (right channel) and the other with a black band (left channel). Both hexes use a 12 mm wrench for tightening. Of course, pliers will work in a pinch. The ground lug has an elongated hole that accommodates more than one wire, which is always useful. This is a great price for a great connector, and the hex feature makes assembly a breeze!
In case you missed it, there's a lot more information about the preamp here.
The four ways that you can order a PR-102 Preamplifier are shown here. In the next section, you'll see more great things to add, like a phono section and a headphone amp. Please note that gold plated RCA jacks now come standard.
When you click the button above and check-out, you'll order the PR-102 Preamplifier kit which doesn't include the remote control.
When you click the button above and check-out, you'll the PR-102 Preamplifier kit that includes the remote control. The PR-102 kit is an enhanced version of the popular PR-101. It has two new features, MONO and HUSH. Select your source, change the volume and balance, switch the tone/volume controls in or out, mute the sound, control which amp (A or B) is driven, all without leaving your listening spot.
Order the PR-102 Preamplifier with remote control, in assembled and tested form. It's ready to go as the control center for your music reproduction center. No assembly necessary! Please note that the PR102AT is built and tested when you order it. That's the time to add thing like a phono section, or a headphone amp. There are additional assembly charges to add assembled and tested phono sections or headphone amps to your PR102. Send me an email if you'd like a custom quote. Once your order is placed, you'll receive an email with the build schedule.
If you don't see the variation your looking for, send me an email for a custom quote. You could order something like a complete, assembled and tested PR102 with a remote control, gold-plated input jacks, a phono section, and a headphone amp. Whatever variation you need, just ask me, and I'll send you a quote.
Are you using your PR-101 or PR-102 with your video system? If so, it would be handy if the same Xfinity/Comcast remote that controls what you see could also control the volume of what you hear. That's what version 1P3 of of the control processor does. You'll have to open your PR-101 or PR-102 and swap the IC's. Please note that only volume up and volume down functions are suppported in the Comcast/Xfinity Remote. All the rest of the remote control functions are still available using the Akitika remote control. Rev 1P4 is the latest software version, the version that is currently shipping.
Here's a link to the documentation about setting your Xfinity Remote.
The original knobs for the PR-101 and PR-102 were silver. Through the years, some folks have asked for black knobs with more prominent indicators. After a long search, I found the nice looking black knobs with silver accents pictured above. The original silver knobs are on the left, the new black knobs are on the right. No tools are needed to change your knobs. The old knobs pull off, and the new knobs push on.
Don't order this kit if you are buying current PR-102 preamp production. Why? Because the black knobs with the silver accent ring are already a standard part of the current PR-102 production!
We have phono preamp kits in stock for you to order. The cost, at $99 is still so low you'll wonder how we can make it this great! Remember though, it's a kit. You supply the labor, I supply the parts, the great circuit and PCB design. The combination gets you an unbeatable combination of sound and value. Order yours now...You'll enjoy building it and you'll love the sound.
By the way, so long as you have a source of clean +/-12V to +/-15V DC, you can buy this kit and put it into any of your DIY audio projects. Yes, it fits perfectly into a PR101 or a PR102, but I'm sure you'll find a lot of other places to put this great sounding phono preamp!
We still use 1% components in the critical frequency determining networks. This makes for better than +/-0.1 dB equalization accuracy. The phono preamp has selectable gain and low frequency cutoff, allowing you to optimize your listening. Make sure you pick up the manual that matches the version of the preamp. Why two versions? The most recent version was made because some of the original 1% capacitors were no longer available in the original footprint.
In case you missed it, there's a lot more information about the phono preamp section here.
The Headphone Amp for the PR-101 or the PR-102 is in stock and ready to order. It fits under the tone/volume PCB, leaving the option slots free for more new projects!
You can find more information here.
Mounting hardware for power transformer is included, but not shown
This is the power supply used in the PR-101 and PR-102. It has +12V, -12V, and +5V low noise, linear regulated outputs. It can be wired for 120 V or 240 Volt operation. It comes complete with the PCB, parts, heat sinks, and a UL listed, low noise toroidal power transformer and associated mounting hardware. Great sound rests on a foundation of clean, quiet, and well regulated power. Use this power supply as the foundation of all your projects.
Specifications (unless otherwise stated, all specs are at 27 C)
You can add the MONO and HUSH functions of the PR-102 to your PR-101. Just order the Tone Volume Upgrade kit, build the tone volume board from the PR102, and install it into your PR-101. This link has more information about the upgrade process. The new tone volume board has two sets of outputs, making it easier to wire in a phono preamp. It also has a new topology in the volume control that makes the signal path a bit shorter than in the PR-101. Of course, both boards have vanishingly small distortion and noise.
The kit is supplied with a 10 pin connector to be compatible with PR-101 controllers. As such, the assembly method differs a little in the area of the 10 pin connector. You can find the information you need here
This oscillator has state of the art distortion performance, about 30 times lower than the less expensive 1 kHz oscillator shown above. This distortion is better than the best A2D's, D2A's, and sound cards. Typically, getting distortion this low would could at least $1000.
How do we do it? Well, start with a really careful layout. Make sure you groom where all the nonlinear currents go. Bypass the power supplies well. Use only the highest performing op-amps. Use a high selectivity topology with low distortion. Top it off with the oldest trick in the book...an incandescent lamp used to provide the perfect balance of positive and negative feedback and LOW distortion! The only way you can get lower distortion is with an Audio Precision oscillator. The only way to measure the distortion is on an Audio Precision Distortion Analyzer in FFT Residual mode.
It has stereo RCA outputs and a level control. It also runs from a pair of 9V batteries (not supplied), and has an LED power light. The specs:
Download the assembly manual.
These banana jacks allow you to attach up to 12 AWG wire to the speaker binding posts of the Dynaco Stereo 120, Akitika GT-101 or GT-102, or any amp where you've installed the ST80BP upgrade kit. We provide 4 banana jacks, and they're color coded. This makes it easy to get your speaker phasing correct, which helps bass, and avoids left-right confusion, which can help imaging. With broad mating surfaces, and quick, secure connections, you can easily swap amps and speakers. Because these banana jacks will accept up to 12 AWG wire, you can have longer speaker runs with lower loss and better damping, improving your sound.
In the lower 48 states, we typically use USPS priority mail or first class mail for small packages. Larger packages, like the GT-101, are shipped using UPS ground.
Small packages, under 4 pounds in total weight, ship by First Class International Mail. Larger packages go by Priority Mail International, which takes 6-10 business days. Extra charges are typically involved in international shipments. Our international customers are responsible for paying any applicable duties on their shipments.
The Customs Forms require your phone number! Please send your phone number in an email to dan@akitika.com along with your order.
We will contact you and work out the additional charges that may be required for international shipping.
There are so many options for international shipping that we handle it on a case by case basis. If you're an international customer, we'll calculate if there is a required delta in shipping cost above domestic (United States) rates. You can pay that delta by selecting the correct value from the above International Shipping Delta pull-down menu, then click the the "add-to-cart" button. If you prefer, we can also invoice you separately for the delta in cost for international shipping.
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