Headphone amplifiers

QRV-08 power up

Started by svarthvitt

Pages1 2 3

Replies: 43
Views: 49,392

June 13, 2019, 09:11:47 PM
by svarthvitt

Questions about QRV01 QRV03 QRV08

Started by semola

Replies: 1
Views: 6,852

March 03, 2010, 03:34:43 PM
by peranders

QRV-04 failure

Started by savinalexandru

Replies: 8
Views: 14,387

May 09, 2016, 02:29:55 PM
by savinalexandru

wich of the amps have better quality?

Started by samsagaz

Replies: 1
Views: 6,278

December 28, 2009, 04:57:57 AM
by peranders

Power supply for QRV07

Started by renlute

Pages1 2

Replies: 16
Views: 15,231

December 17, 2010, 05:52:55 PM
by peranders

QRV-07 gain

Started by peterklimo

Replies: 3
Views: 7,614

December 08, 2007, 02:23:37 PM
by peranders

Tobias' QRV-07 bygge

Started by peranders

Replies: 0
Views: 7,184

November 06, 2005, 08:23:19 AM
by peranders

QRV-08 Headphone amp with current feedback and super ....

Started by peranders

Replies: 9
Views: 13,273

June 02, 2006, 10:48:29 AM
by peranders

QRV-07 problem

Started by peranders

Replies: 0
Views: 6,402

March 20, 2006, 09:45:07 PM
by peranders

QRV-04 as a line stage

Started by peranders

Replies: 0
Views: 6,327

October 09, 2006, 02:39:00 PM
by peranders

QRV-02 support JIN

Started by peranders

Pages1 2

Replies: 21
Views: 19,026

May 04, 2006, 11:42:29 PM
by peranders

QRV03 questions

Started by peranders

Replies: 0
Views: 6,096

February 23, 2009, 09:10:59 PM
by peranders

Which kit good to Balanced Headamp?

Started by palchiu

Replies: 3
Views: 7,194

November 21, 2010, 11:10:34 AM
by peranders

QRV07 & QRV08 build costs

Started by nightanole

Replies: 14
Views: 17,092

August 08, 2010, 11:05:28 PM
by renlute

Simple board for THS6012 (TPA6120)

Started by misterstarshine

Replies: 4
Views: 11,303

June 17, 2010, 08:45:15 PM
by peranders

QRV-08 - ett fel och ett misstag

Started by maust

Replies: 13
Views: 14,767

March 19, 2015, 10:55:57 PM
by maust

QRV-09 - rectifiern funkar sådär bakvänd

Started by maust

Replies: 2
Views: 9,530

March 21, 2015, 01:07:03 AM
by maust

QRV-08 setup questions

Started by mabu0815

Replies: 4
Views: 10,188

November 01, 2014, 05:09:57 PM
by Matthias

QRV08 - IC4/5 and IC 8/9 LM431 must be populated?

Started by mabu0815

Replies: 2
Views: 8,819

October 16, 2015, 11:36:58 AM
by mabu0815

QRV08 - Humming sound from transformers

Started by mabu0815

Replies: 1
Views: 8,416

February 04, 2016, 07:01:18 PM
by peranders

QRV-03 question

Started by krainov

Replies: 9
Views: 12,770

May 05, 2018, 01:27:58 PM
by peranders

QRV08 output voltage offset and the servo

Started by Kingston

Replies: 8
Views: 14,703

December 06, 2013, 09:38:49 PM
by peranders

Case for QRV08

Started by joze7205

Replies: 0
Views: 5,922

October 27, 2009, 07:51:43 PM
by joze7205

Problem QRV-09

Started by joBe

Replies: 4
Views: 10,816

January 19, 2014, 05:00:23 PM
by peranders

qrv-07 building and test

Started by Jinkslynx

Replies: 2
Views: 7,802

May 14, 2007, 06:43:22 PM
by Jinkslynx

Headphone amplifier for HiFiMAN HE-6

Started by jimvibe

Replies: 7
Views: 13,132

June 12, 2015, 08:02:27 PM
by peranders

QRV09 Capacitor wrong size

Started by jhmvanbeek

Replies: 5
Views: 11,452

March 02, 2014, 10:32:35 AM
by jhmvanbeek

QRV-08 with 12V rails

Started by jezz

Replies: 11
Views: 14,381

January 17, 2015, 09:47:29 AM
by peranders

Cleaning the PCB

Started by Houghtkj

Replies: 2
Views: 9,549

April 02, 2012, 08:25:29 PM
by Houghtkj

QRV-08 Parts Selection

Started by Houghtkj

Replies: 5
Views: 12,255

March 22, 2012, 07:57:26 PM
by peranders