Quad Eight Limited Edition Classic Channel Strips

The 333c Classic and 444 Classic are limited edition recording channel strips from the legendary Quad Eight Electronics.

Each 333c Classic channel strip features an original factory restored, 70’s limited production 3-band eq with many special features including precision stepped potentiometers, with 31 frequencies per band, and .8dB per step gain on each of 3 bands. 11 frequency selectable High and Low pass filter frequencies, +/-15dB overall gain trim and a signal presence led.

The 444 Classic channel strip EQ section includes an original factory restored, 70’s 4-band quasi-parametric eq with separate controls for gain, frequency and Q on each band, with peaking and shelving positions selectable on high and low bands. Two selectable frequencies are available for both High and Low pass filters.

Both Classic equalizers are paired with the QE MP-227, a world-class 70’s single stage preamp, renowned for its warm qualities on guitars, vocals and harmonically complex instruments. Transformer coupled, in and out, selectable input impedance for optimum matching to each microphone, Phantom, Phase, Pad switching, and gain control up to 56dB.

Each preamp and equalizer of the Classic series shares the well-known Quad Eight Class-AB high voltage discrete opamps, with their low noise, wide dynamic range, high headroom, and clip points approaching +30dBm.

These are limited editions: Only 50 units of each model will be built. Please reserve yours now.

Quad Eight™ MP 227
Input Impedance:		150 or 600 ohms Selectable
Output Impedance:		600 ohms Transformer Balanced
Output Level, Minimum:		+27dBm into 600 ohms; +30dBm into 150 ohms
Frequency Response:		±0.25dB, <10Hz to 45KHz
Distortion:		0.1%thd, 20Hz to 45KHz; (typ .02%thd)
Noise:		-90dBv Ref: .775v In
Gain Select:		30-54db in 2db steps
Power Requirements:		100ma max @ ±28vdc

Quad Eight™ EQ 333c
Input Impedance:		10K Bridging / Transformer coupled
Input Level, Maximum:		+27dBv Ref: .775v
Output Impedance:		50 ohms Unbalanced
Output Level, Minimum:		+27dBm into 600 ohms;+30dBm into 150 ohms
Frequency Response:		±0.25dB, 20Hz to 20KHz
Distortion:		0.1%thd, 20Hz to 20KHz; (typ .05%thd)
Noise:		-85dBv Ref: .775v EQ-in
High Pass Filter:		11 Selectable 30Hz, 40Hz, 50Hz, 60Hz, 80Hz, 100Hz, 120Hz 150Hz, 190Hz, 240Hz, 300Hz
Low Pass Filter:		11 Selectable 2KHz, 2.5Khz, 3KHz, 4 KHz, 5KHz, 6KHz, 8KHZ 10KHz, 13KHz, 16KHz, 20KHz
Peak/Shelving Switch: (On High & Low Bands)		.7Q In Peak Position: Shelving = 6dB/Octive
Equalization, Frequencies:		93, Selectable
	Low:	31 Frequencies, 50Hz to 500Hz
	Mid:	31 Frequencies, 300Hz to 3000Hz
	High:	31 Frequencies, 1500Hz to 15000Hz
Gain Select:		+/-12dB, 30 Positions; .8dB Per Step on each band
Power Requirements:		50ma max @ ±28vdc

Quad Eight™ EQ 444
Input Impedance:		50K Differential; 30K Unbalanced
Input Level, Maximum:		+27dBv Ref: .775v
Output Impedance:		50 ohms Unbalanced
Output Level, Minimum:		+27dBm into 600 ohms;+30dBm into 150 ohms
Frequency Response:		±0.25dB, 20Hz to 20KHz
Distortion:		0.1%thd, 20Hzto 20KHz; (typ .05%thd)
Noise:		-84dBv Ref: .775v EQ-in
High Pass Filter:		12dB/Octive @ 50Hz & 100Hz, Switchable
Low Pass Filter:		12dB/Octive @ 80Hz & 10KHz, Switchable
Q Select Switch (All Bands):		Narrow = 1.2, Wide = .5
Peak/Shelving Switch: (On High & Low Bands)		Shelving = 6dB/Octive (On high & Low Bands Only
Equalization, Frequencies:		44, Selectable
	Low:	50Hz, 60Hz, 90Hz, 100Hz, 120Hz, 160Hz, 200Hz, 250Hz, 300Hz, 390Hz, 500Hz
		——-
	Mid 1:	180Hz; 220Hz, 270Hz, 350Hz, 440Hz, 560Hz, 720Hz, 910Hz, 1100Hz, 1400Hz, 1800Hz
	Mid 2:	500Hz, 630Hz, 880Hz, 1000Hz, 1200Hz, 1600Hz, 2000Hz, 2500Hz, 3000Hz, 3900Hz, 5000Hz
	High:	1800Hz, 2200Hz, 2700Hz, 3500Hz, 4400Hz, 5600Hz, 7200Hz, 9100Hz, 11000Hz, 14000Hz, 18000Hz
Gain Select:		± 2dB, ± 4dB, ± 6dB, ± 9dB & ± 12dB on each band
Power Requirements:		65ma max @ ±28vdc