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AUDIO MODIFICATIONS
http://www.high-endaudio.com/Modifications.html
These modifications, in part or in whole, can also be performed on most other tube preamplifiers. BASIC MODIFICATION Every tube preamplifier has coupling capacitors (the caps actually in the signal path to block DC), and these caps must be at least "excellent" in quality to optimize that preamp's inherent sonic potential.
Amplifier Mods - Stereophile.com
https://www.stereophile.com/content/amplifier-mods-1
Amplifier Mods. I have recently purchased a HIGHLY modified Hafler DH200 amplifier, just for kicks. It has a new power transformer (not the origional type), circuit board, Cardas copper binding posts, Blackgate capacitors totally throughout (yes, even the big can ones), plus many other extras. I was able to select the upgrades that I wanted.
Purifi amp mods - tweakaudio.com
http://tweakaudio.com/EVS-2/Purifi_amp_mods.html
The cost of Mod 5 is $400. The all out mod for a Eval-1 buffer input amp would be $650 (Mods 1-4 above). $50 discount. The all out mod for a discrete input buffer amp would be $1050 (Mods 1-3 and 5 above). These prices are for a stereo amp. Mono blocks and dual mono stereo amps would be slightly more. All prices plus return shipping.
Modifications to Boyuu / Douk Audio A10 EL34 amplifier
https://filedn.com/l7UsPK07cbB4Azv0FsTo1rH/A10%20modifications.pdf
Modifications to Boyuu / Douk Audio A10 EL34 amplifier 1. Stock version: Ultra-Linear mode connection only Modification: Placed the amp to Triode mode, a truly simple mod with great return. Effect: Significant improvement in definition and bass control. Placement and soundstage improved quite noticeably also.
Amp Upgrades by Linear Tube Audio
https://www.lineartubeaudio.com/products/amp-upgrades
Linear Tube Audio Products. MZ2 Headphone Amp / Preamplifier MZ3 Headphone Amp / Preamplifier Z10 Integrated Amplifier Ultralinear Integrated Amplifier Z40 Integrated Amplifier MicroZOTL Preamplifier ZOTL10 Power Amplifier ZOTL Ultralinear+ Amplifier ZOTL40 Reference+ Amplifier Z10e Electrostatic Headphone Amplifier LPS+ Linear Power Supply
Amplifier Mods or "upgrades" | DiyMobileAudio.com Car ...
https://www.diymobileaudio.com/threads/amplifier-mods-or-upgrades.78570/
The amplifier was initially sent in for repair, and I had it modified while it was there. Sadly, four months later, the other channel started doing the same dang thing that I had initially sent the amplifier in for. It's your money, but most mods are just snake oil to reduce the money in your bank account.
Game Boy Advance Audio Amplifier– Retro Modding
https://www.retromodding.com/products/game-boy-advance-audio-amplifier
This Hi-Fi, Class-D amplifier module for the Game Boy Advance was created to boost the GBA's low-volume and give it a louder and more robust sound. At maximum volume, this beast provides up to an astounding 24 dB gain. When combined with our premium 1W speaker, this amp allows you to enjoy unprecedentedly powerful sound from your GBA. Features
SMc Audio | Audiophile Products and Upgrades by Steve ...
SMc Audio. Comprehensive Upgrades and Custom Built Audio Electronics from Steve McCormack. DNA-125 GT-20 Mono Blocks - Front. DNA-125 GT-20 Mono Blocks - rear. DNA-125 GT-20 Internals. DNA-125 with Muscle Car Top Cover. DNA-125 with Muscle Car Top Cover - Angle. DNA-225 Upgrade.
MODS FOR DYNACO® TUBE AMPS
MODS FOR DYNACO® TUBE AMPS ST-70 Driver Board Upgrade Currently available ST-70 pcb may be ordered from: Classicvalve.ca KTA ST-70 PCB This is the same design I originally sold until used up in the early 2000's.
Noble Electronics, Audio Mods, High-end Modifications, EAD ...
http://nobleelectronics.net/
The Noble-200 Signature. low-profile, dual-channel audiophile amplifier Noble-200 Balanced input Mod for PM500, PM1000, TM8800 Analog Pass-Thru (Analog Direct). Call for details. Printed Wiring Upgrade and Solder Alloy Upgrade for PM500, PM1000, PM2000, PM8300. Call for details.
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