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Summary of Contents for ModWright Instruments PH 9.0
- Page 1 ModWright Instruments, Inc. PH 9.0 Tube Phono Stage Owner’s Manual Manufactured by ModWright Instruments, Inc. 21919 399th St., Amboy, WA 98601 www.modwright.com...
- Page 2 CAUTIONS: Do not operate or power up unit without ALL tubes installed in tube sockets. Failure to do so will result in damage to tubes. WARNING: DO NOT POWER UNIT ON UNTIL LID IS ENTIRELY FASTENED. VERY HIGH VOLTAGES ARE PRESENT INSIDE UNIT DURING OPERATION. IT IS CRITICAL THAT PREAMP ENCLOSURE NOT BE OPEN WHEN UNIT IS POWERED ON.
- Page 3 The PH 9.0 is a high-gain, low noise phono stage design with exceptional flexibility. Maximum gain for the PH 9.0 ranges from 64dB (MC) to 52dB (MM). Gain may be adjusted by -0dB, -6dB or -12dB for either MC or MM operation. This allows for compatibility with different MM and MC cartridges of high, low or medium gain.
- Page 4 After tubes are installed, replace lid and secure with four screws. Only after this, should the external Power Supply be connected to the PH 9.0 phono stage. Do not connect the Power Supply to AC power until umbilical is connected to both Power Supply and PH 9.0.
- Page 5 If cables from turntable to phono stage have a ground wire, this may be connected to the ground lug on the rear of the PH 9.0. Signal cables must also be connected (RCA or XLR) main outs to preamp. (XLR outputs only present if option installed).
- Page 6 PH 9.0 to preamp. Flip the power toggle up on front face of unit, to power up the PH 9.0. When first powered on, a blue LED above the power switches will be lit. The unit will remain in mute for approximately...
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Page 7: Operation
Operation: Once the PH 9.0 is powered up, you must first select MM or MC input. The knob on the left side of the front panel allows for MM, Mute, or MC input selection when rotated clock-wise. [You will notice that while the input is labeled MM, Mute, MC, there are actually four positions. -
Page 8: Technical Specifications
Frequency Response: 20Hz – 20Khz (+/-.2dB) Weight: PH 9.0 - 12 lbs; PS150 - 17 lbs. Dimensions: PH 9.0 - 10”W x 10”D x 4”H; Power Supply: 7”W x 9”D x 3”H Basic Specifications: (1) pair MM RCA inputs. -
Page 9: Warranty
Warranty: ModWright agrees to warranty product for a period of 5 years from the date of purchase from a factory authorized ModWright Instruments Dealer. Warranty covers parts and labor for repairs due to equipment failure not related to customer abuse and/or neglect. Customer is responsible for shipping costs to and from ModWright Instruments or authorized service center. -
Page 10: Contact Information
Contact Information: If you have any questions about ModWright Instruments products or ModWright modifications or products, please do not hesitate to contact us via phone, e-mail or conventional mail. PH: 360-247-6688 EMAIL: modwright@yahoo.com ADDRESS: ModWright Instruments, Inc. 21919 NE 399...
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