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     New Version G3 Indeed Valve Class A Hybrid Headphone/Pre-Amplifier

This item is selling in 100% new Electro-Harmonix  6922EH Made in Russia tube

Product Description

  • New product by Indeed Hi Fi Lab
    Pure Class A  Headphone Amplifier & Pre Amplifier
    Hybrid ! Valve & MOS-FET in Use!!
    Without any OP amp IC inside!!!
    Audiophile Performance Design Absolutely!!!
  • Our Indeed headphone amplifier is different to others.
    A/ High grade Caps &
    Dale resisters.
    B/ High cost Large 24V2A low noise adapter with grounding.
    C/ Precision select 6922EH valve, also match R/L channel within 1dB out put differential.
    D/ We are the original designer; the old version sell hundreds and very good feedback in history!
  • It is a high value and cute headphone amplifier hook up to your PC / Mp3 /MP4/ ipod / any stereo device.

    You can have a powerful, dynamic and sweet TUBE SOUND from your headphone !

    You’ll be astounded at the improvement in sound quality, dynamic range, meticulous transparency,

    completely demonstrate its high performance and analytical ability,

    it can also connect with power amplifier such as a high performance pre amplifier to improve your Hi Fi system.

    Circuit design reference by Indeed Hi Fi Lab at 5-2011
    100%New
    Electro-Harmonix  6922EH Made in Russia

  • (we have carefully choose and test in Lab).
    -Using Elna Caps and Dale resistor.
    The other one of 6DJ8/6N11/ECC88 is fully suitable for replacement with much difference musical taste chose by owner.

  • (6DJ8/6N11/ECC88 Excluding in this item for sale)!

  • FAQ
     Q: what is Class A ?
     A: Class A means that the power tube conducts the same amount of current all the time, whether idling or producing full power.

    Therefore, it will be high temperature from power MOS FET in normally. Class A is very inefficient with electricity but usually gives very low distortion.

    This is to decrease the distortion such as a high-end amplifier.

     Q: Can I change the 6DJ8/6922/6N11/12AU7/6N23P...... tube to improve the sound quality?
     A: The each one of 6DJ8/6922/ECC88 is fully suitable for replacement with much difference musical taste chose by owner,

    but it is not 100% improve the sound quality absolutely; some time it can change to the favorite sound by carefully chose;

    a precession selects and checking is most important. Never superstition to the high price tubes!!

     Q: I find a similar product with 3 bands EQ, does it better than your G3?How about your sub-bass function?

     

     A: By our sense, any tone control will be colorless the sound and distortion, so you cannot find any high-end device with a tone control;

    it also build in mid/low grade Hi Fi device except Marantz 7 / Cello Audio Palette.

    Our sub-bass function has the same distortion problem even it has less distortion compare to OP amp/EQ, but it can by pass directly, ON or Off ? Depend on you!

    Some time it will work great with normal grade device in sub-bass mode.

     

    Technical specification:

    • In Put Power: DC24V 900mA

    • Input Sensitivity:50mV

    • Input Impedance: 100KOhm

    • Out-Put Impedance:12~600 Ohm

    • Output:6V(before peak) measure at 33 Ohm loading

    • Dynamic range: 86dB((300 ohm) 90dB(33 ohm)

    • Gain:20dB

    • Frequency response:5Hz-30KHz +/- 0.25dB (Sub-Bass Off)

    • Sub-Bass (ON):100Hz + 8dB / 10KHz + 4dB ( volume knob turn in 9 O'clock position)

    • Minimum THD:  0.016%(300 ohm)  0.45%(13 ohm)

    • Signal/Noise Ratio >92dB

    • RCA 2CH input X1 / 3.5mm 2CH input socket X 1  / RCA 2CH output X1

    • 6.3mm 2CH Output X1

    • Shipping Weight: 1kg

    • Transformers AC100V ~AC240V\50~60Hz  1.8A  DC output 24V2A

    • It has a ferric filter ring on DC power cord to reduce noise; much high performance than other similar product.

    • Dimension:100mm (D) X 100mm (W) X 50mm (H) not measure to tube and transformer.

 What is different coming?

G3, it has creative from last version Indeed <G2 Valve Class A Hybrid Headphone/Pre-Amplifier>,

most of copy and similar product following us, so we must beat their and keep a distance with our technical skill.

We have modified to generation III now, so that we call it G3.

 

What is different coming?

1/ The output signal will be fade in when power on, you can hear the level of sound increasing slowly,

it is most important to protect your ear and device / speaker in safe, either it fade out too when power off!

It has no any ‘pop’ pulse to out put even power on/off, thank for a precision design by Indeed Hi Fi Lab,

a twin servos to bias regular control automatically, it can also extend more dynamic to the sound effect.

 

2/A large size volume knob easy to adjust with wide turning angle than G2 and similar product.

The thick of PCB increase to 1.8mm with carefully design grounding, the RF pollution and noise ratio also improved.

 

3/A loudness / sub-bass function available to low level hearing, it sounds with rich bass and clear treble for joy;

which effecting decrease in linear when turning up the volume knob,

this function disable when it turn over 12 O’clock position even the sub-bass switch ON,

so it has reasonable linear fit for human hearing sensitive.

    

4/Easy to change the tubes with jumper on PCB (bias adjust is necessary),

6 series for 6DJ8/6922/ECC88/6N11/6N23P; 12 series for ECC82/12AU7/12AT7/6N4……also too many choose by owner right now.

 

5/Ultra large current Class A output design, it can drive the low impendence headphone in 12 Ohm loading;

a very deep and powerful bass you will be hear !

 

6/Audiophile Performance Design Absolutely! It can hook up to power amplifier directly such as Pre Amp to use;

it will kill any pre amp with US$1000- price (may be higher)!!


"Dale" resistors is very high cost than other similar product, it working most stable in long life and also sounds…
• Precise pin pointing focus.
• Equal resistance (L/R) all the way.
• Deeper depth and sweeter vocal.
• Cleaner bass and sweeter treble.
• Sound image is much improved. Pin point image!!!

If you would like to take total care of your amp, resistors are the first one to be focused.

Resistors are used more of any other components in an amp circuit, therefore each small impact can make a big difference in total.

Package Contents:  Also shown as photo !

  1. 1 x Indeed G3 Headphone Amplifier

  2. 1 x Electro-Harmonix  6922EH New in box!

  3. 1 x 1M AC power cord ( the plug depend on buyer country )

  4. 1 x Indeed ultra low noise Switching Power Supply Universal AC 100V-240V~1.8A / 50~60Hz to 24V DC 2A out put
    (Auto-Detect International Compatible)

  5. 1 x 6.3mm to 3.5mm Gold coat earphone Jack adapter.

 

  Indeed Hi Fi Lab stands behind all of its products and services.Check our feedback and buy it with confidence.

This weekend I finally had an opportunity to listen extensively to the G3.
It is absolutely awesome- surpasses all expectations.
Listening to music ranging from Manuel Goettsching's electronic compositions to Glenn Gould playing the Goldberg Variations to Leonard Cohen's latest I found it did not add or take away but gave the output 'liveliness' which one simply does not hear when listening to strictly digital.
Well done and thank you for a superb product.
Please feel free to use this endorsement however you might wish.

finnwake666     3-7-2012

Notice:

By some reason! we are sorry that, we cannot provide circuit diagram this time.

Payment & shipping

We accept Paypal only, it is fast, easy and safe.
International shipping charges by AIR post. It usually takes 10-15 business days (almost 2~3 weeks)to arrive.deliver shippment fastly and seldom lost parcel.
The item will be shipped via Hong Kong Registered Air Mail
with tracking number to trace on web and marked as gift.
 
Please allow 2 to 3 days on processing for the order. 
However, package to following country may need longer time (2-6weeks) due to strict custom inspection: Italy, Brazil, Spain, France, Germany.
International order will be processed in 1 - 2 business days.
We can also provide express post by EMS(5-8 days) or DHL(4-5 days). The cost is a higher than standard postage, about US$25 or higher.
Import duties, taxes and charges are not included in the item price or shipping charges. These charges are the buyer’s responsibility.
Please check with your country’s customs office to determine what these additional costs will be prior to bidding/buying.

Contact us:

     We are China commerce enterprise with our own affiliated factories. We have pointing office shipping the items to overseas.

 We are supplying many items to all over the world. High quality, reasonable price, considerable service,

reliable credit standing is our tenet.
It's my pleasure to response

any questions about Hi Fi technology.

thanks

Peter. Indeed Hi Fi Lab