Serial #

Let the preamp tube(s) cool down, if necessary, before handling. Tube heater filaments are somewhat more suceptable to damage when warm or hot.

Each tube should require only moderate force for removal and replacement. Gently rock the tube back and forth a bit during removal or replacement. Avoid bending the circuit board. Notice that the heaters of the 6922s are connected in series, and neither channel will function if one of the filaments is open or burned out, or unless both of the 6922s are installed. Akin to those old Xmas tree lights in the attic, no? Be careful to straighten any bent tube pins prior to installation; pin misalignment will make fitting the replacement tube difficult or impossible, and may damage the socket. Be careful to put replacement tubes in the proper sockets.

Never substitute other type numbers of 9-pin tubes without careful research. There are literally thousands of types that share the 9-pin mechanical basing arrangement, but NOT the internal electrical connections! Mechanically compatible tube plugs and sockets by no means indicate electrical compatibility! And random experimenting can easily and quickly destroy the substitute tube and other parts of the preamp!

Three tube types that are electrically and plug-socket compatible with the 6922 dual triode are the 7308, 6DJ8 and the ECC88 / E88CC. There is no direct replacement for the 7044 dual triode.

VARI	RIGHT		MC-1 IN		MC-1 IN	LEFT		VARI
					CHASSIS
					GROUND
					CIRCUIT
	LINE IN		MC-2 IN		MC-2 IN		LINE IN
	RFI	SHUNT	MM IN	SERIAL #	MM IN
	RFI	SHUNT		SERIAL #	RFI		SHUNT
	ON	OFF			OFF		ON
	1						1
	2						2
FIXED								FIXED

Please direct any questions to your dealer or MANLEY LABS for further assistance.

Page 11

MM/MC GRAMOPHONE CARTRIDGE PREAMPLIFIER specifications

The Manley Labs MM/MC Gramophone Cartridge Preamplifier stands as a remarkable piece of audio equipment, designed to elevate the listening experience for vinyl enthusiasts and audiophiles alike. Renowned for their expertise in high-fidelity audio, Manley Labs has crafted this preamplifier to deliver exceptional sound quality and versatile performance for both Moving Magnet (MM) and Moving Coil (MC) cartridges.

One of the standout features of the MM/MC Gramophone Cartridge Preamplifier is its high-quality analog signal processing. The preamp employs vacuum tube technology, incorporating premium 12AX7 and 12AT7 tubes to provide a warm, rich sound that many listeners treasure. The implementation of soft and natural tube warmth contributes to an organic sound, preserving the authenticity of vinyl recordings while enhancing detail and nuance.

This preamplifier offers adjustable gain settings, allowing users to optimize performance according to their specific cartridge choice, be it MM or MC. With the capability to accommodate various cartridge output levels, the Manley Labs preamp ensures maximum adaptability. Users can switch between settings easily, ensuring compatibility with a wide range of turntables and cartridges.

Additionally, the MM/MC Gramophone Cartridge Preamplifier features high-quality components throughout its design. Its circuit topology is engineered to minimize noise and distortion, ensuring a clean signal path. The unit is also equipped with a low-frequency filter, which can be utilized to eliminate unwanted subsonic frequencies that could muddy the audio experience.

Another notable aspect of this preamp is its robust build quality. Encased in a sleek metal chassis, it combines aesthetics with durability, ensuring longevity while adding a stylish touch to any audio setup. The carefully designed layout not only contributes to the preamp’s performance but also showcases Manley Labs’ commitment to craftsmanship.

In conclusion, the Manley Labs MM/MC Gramophone Cartridge Preamplifier is a premium choice for vinyl lovers seeking a high-performance preamp that combines vintage warmth with modern adaptability. Its advanced features, high-quality components, and user-friendly design make it an essential addition for anyone looking to enhance their vinyl listening experience profoundly. With this preamplifier, Manley Labs continues to uphold its reputation for excellence in high-fidelity audio.

MM/MC GRAMOPHONE CARTRIDGE PREAMPLIFIER specifications