REDGUM RGi35HF  

Headphone Amplifier


REDGUM RGi35s Amplifier


Power Output: equivalent to the Output of a mainstream "commercial" 200+200W/Ch RMS amplifier
when headphone socket fitted as standard (see design note below)
Harmonic Distortion: less than .009% (below Clipping)
Intermodulation Distortion: less than .005% (below Clipping)
Signal to noise: greater than 100dB
Input Impedance: 10K ohms (matches 600 ohms - 50K ohms)
Slew Rate: greater than 65Volt / microsecond
Damping Factor: greater than 150
Frequency Response: 0.8 Hz to 80KHz (-3dB points)
Peak Current: greater than 120 amps
Audio Inputs:

CD1, AV1, DVD, CD2, AV2
Audio Out:

via 2 gold Headphone jacks (see design note below)
Suggested Headphones: your choice entirely - the unit will be made to match their impedance
Cabinet Finish: high gloss solid Red Gum wood fascia, black gloss thick steel chassis
Options: choice of Dual Mono or Single volume (see design note below); 

key switch, rocker or toggle switch; 

alternative front panels can made to order (at additional charge) or as supplied by customer;

Other possibilities? just talk to us about it!
Warranty: Full 7 year Warranty
Dimensions: 420mm (W) x 360mm (D) x 95mm (H)
16.5in (W) x 14.2in (D) x 3.75in (H)
Shipping weight: 8 kg / 18 lb (8.2 kg/18 lb cubic)

 

 

Consider the unseen Speaker Line ...

 

At REDGUM, all our designs carefully avoid adding any contact points in the speaker line.  This is because, traditionally, headphone sockets in an amplifier connect in the speaker line and thus are a constant 'impedance' when the headphones are NOT in use. i.e. for most amplifiers, this is most of the time!! This connection point of the headphone socket into the speaker line takes the form of a miniscule switch, one still clearly reflecting its origins (as designed for telephone systems) of only needing to switch the fine signals for headphones. Hence, for the entire life of the amplifier, its complete output  is passing through these tiny contacts, which are the diameter of a pinhead.

 

This invisible situation in the speaker line circuit is in remarkable contrast to all the care and attention given to the integrity of the visible speaker line, e.g. the external use of cables "the thicker, the better", and huge terminals. So, clearly, having a Headphone socket included as a Standard feature in an amplifier is doubly of NO value - well, not for a HiFi amplifier, let alone one that is principally used with speakers. If only for these two reasons, we are sure you will welcome the arrival of REDGUM's dedicated Headphone Amplifier.

 

As headphones require volts rather than current from an amp, so a higher regulated voltage is used here from a lower powered transformer (thus giving the equivalent output of a commercial 200W ca. amplifier). Due to the specific power supply design, the RESIDUAL NOISE LEVEL IS EXTREMELY LOW. (So inky black that you'll believe it when you, er ... don't, hear it!) Your interface with this is via a pair of gold headphone jacks on the rear of the amplifier. This quality of internal contact is a rare situation for 6.5mm jacks, but a detail that REDGUM considered most important.

 

Each RGHF is constructed from the ground up as a headphone amplifier,  although its design shares elements of the RGi35. One of the advantages of this  design overlap is that the RGHF does require a selector knob to enable the choice of 5 MULTIPLE SOURCES e.g. CD/TV/iPod/MP3. Being  made to order also allows  for the incorporation of the sensitivity of the chosen headphones. Depending on preference, customers can also choose either a single or a dual volume control. However, REDGUM would always recommend the dual volume version over the single as all too rarely is our hearing equally acute in both ears. With each ear enclosed and thus isolated by the headphone, these differences in acuity becomes all the more apparent. (Don't find this out too late!! - trust us, dual volume it is!!)

 

 

 

 
~ product design and specification subject to change without notice ~