Rotel RHQ-10

1 9 9 1 1991
1 9 9 6 1996

Part of the Rotel MICHI series.

Michi means "direction" and the RHQ-10 was named Shih : poetry, as written on this image.

At first with only three components, the Michi series was later complemented in some markets by one variant, two sources and a less expensive sibling :

RHB-10 dual-mono power amplifier
RHC-10 passive controller
RHQ-10 phono equalizer
RHA-10 active preamplifier
RHT-10 FM tuner
RHCD-10 CD player (big)
RHB-05 power amplifier.

The PCB of the RHQ-10 is made of high-grade fiberglass with 0,1% and 0,01% tolerance metal film Vishay resistors in the signal paths, eq and NFB loop.

The first and head-amp stage is a triple parallel differential fully complementary push-pull ; the second stage is a passive pole low-pass filter ; the third is a low frequency boost and gain stage.

The output stage is a single-ended fully complementary push-pull circuit in Class A. Discrete components throughout.

One input is available, with two outputs : Fixed 1 is for connection to a passive controller or preamplifier which bypasses the volume control ; Variable is for going directly into a power amplifier ; Fixed 2 is for connection to a passive controller or preamplifier when using a moving coil cartridge of extremely low output.

The MM / MC gain & impedance selection however remains mysterious and rests on "an ingenious method to minimize any adverse effect upon sound quality often cause by mechanical switching" - anyone ?

The gain switch/attenuator is supposedly the same 4-gang as in the RHC-10 but they don't look equivalent (and that of the RHA-10 is, again, different as well).

Power-supply is done by a (sizeable) low-leakage toroidal transformer ; dual-mono regulations throughout, copper bus bars, liberal heatsinking, sealed output relays, non-magnetic aluminium chassis and Teflon-insulated WBT terminals.

Like the RC-5000 and RB-5000, the Michi series was mostly made for the export market and is just as exceedingly rare.

Rotel RHQ-10, image 1 Rotel RHQ-10, image 2 Rotel RHQ-10, image 3
Rotel RHQ-10 specifications
Title Value
MM input : 2,5mV / 47kOhm / 100pF
MC input : 0,3mV / 100 Ohm
RIAA accuracy : ± 0,1dB
Fixed 1 output level : 0,775V / 100 Ohm (for 0,3mV input)
Fixed 2 & Variable output level : 0,775V / 100 Ohm (for 0,1mV input)
THD : 0,005% (20Hz...20Khz)
S/N ratio : 90dB (IHF-A ; MM)
75dB (IHF-A ; MC)
Overload : 30dB (MM / 1Khz / 0,5% THD)
30dB (MC / 1Khz / 0,5% THD)
Crosstalk : 80dB (20Hz...20Khz)
PC : 18W
Dimensions : 47 x 7,6 x 33,2cm
Weight : 6,8kg.
Chassis number : TRP-559
Rotel RHQ-10 : 0 topic
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page online since : october 2009
page updated : september 2010
page type : LGT / KNB
page weight : 201.47 Kb / 0 b

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