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Summary of Contents for ALLNIC AUDIO H?1500 II PLUS PHONO STAGE
- Page 1 ALLNIC AUDIO H‐1500 II PLUS PHONO STAGE OWNER’S MANUAL ...
- Page 2 ALLNIC AUDIO H-1500 II PLUS PHONO STAGE Thank you for purchasing this Allnic Audio H‐1500 II PLUS Phono Stage. We are certain your trust in Allnic Audio and Hammertone Audio, as well as your appreciation for the sound of this high‐quality device, will be rewarded by its excellent operation for years to come. Please read this entire manual before you connect the H‐1500 II PLUS to the other components of your system and the wall outlet.
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Page 3: Table Of Contents
TABLE OF CONTENTS: ___________________________________________________________________ H‐1500 II PLUS INTRODUCING THE PHONO STAGE ___________________________________________________________________ WHAT’S IN THE BOX? ___________________________________________________________________ SAFETY ___________________________________________________________________ CLEANING Chassis Connectors ___________________________________________________________________ INITIAL SET-UP Location, Location, Location Power Connection Inputs Outputs Moving Coil (MC) Transformer Controls A Note On Phase Impedance ___________________________________________________________________ INITIAL POWER ON ___________________________________________________________________ OPERATION ___________________________________________________________________... -
Page 4: Introducing The H-1500 Ii Plus Phono Stage
INTRODUCING THE H‐1500 II PLUS PHONO STAGE improved signal to noise ratios, low cost and consistent operation. Some of the shortfalls are looser bass reproduction and possibly a pinched The H‐1500 II PLUS is Allnic Audio’s mid‐line phono and compressed high frequency playback due to stage model, just under the top of the line H‐3000. excess feedback ratios. Like all Allnic Audio products, it uses Permalloy (iron and nickel alloy) for its transformer cores. Allnic is B. Passive filters (CR type): grateful to Mr. G.W. Elmen of Western Electric for inventing Permalloy for transformer core use, and in ‐ The frequencies are filtered to fit the RIAA so doing, providing an enormous service to specification by varying the amount of attenuation recorded music listeners everywhere. at different frequencies through a complex capacitor‐resistor network. This technique results The H‐1500 II PLUS has the following features: in no voltage overload, purer reproduction • (because there is no feedback), and more accurate LCR TYPE RIAA EQUALIZATION: RIAA compensation. However, there are problems because the system provides no gain, and RIAA equalization is a specification for the correct insertion loss and impedance matching issues playback of vinyl records, established by the arise. Recording Industry Association of America. The purpose of the equalization is to permit longer C. Hybrid filters (use of both CR and negative playback times and improve sound quality. ... -
Page 5: What's In The Box
• But LCR RIAA units have drawbacks as well. One (1) power umbilical cord • These drawbacks are high cost and the One (1) IEC type power cord • difficulty of impedance matching; the latter One (1) Owner’s Manual has been the primary hindrance to the commercialization of this superb method in Note: the construction of phono stage amplifiers. The H‐1500 II PLUS and its power supply ship with However, Allnic Audio manufactures a high the tubes installed. quality LCR RIAA unit and has developed a The H‐1500 II PLUS power supply will work with 600 ohms impedance matching method. most IEC type aftermarket power cords. Of course, only you can determine the power cord • For superior signal to noise ratios, the H‐1500 that works most synergistically with the H‐1500 II II PLUS is equipped with pure vacuum tube, PLUS in your system. high voltage regulation for each channel and Be sure the H‐1500 II PLUS power supply unit is a power supply unit separate from the phono labeled for the AC voltage of your location. If it is stage itself. not, please contact Hammertone Audio. • High quality MC Step‐up Transformers with Permalloy cores are used for the H‐1500 II We advise that you keep the boxes and other packing PLUS’s dual MC inputs. ... -
Page 6: Connectors
water only (NO cleaning fluids!) to clean the sensitive piece of electronic designed for neutrality faceplate and chassis of the H‐1500 II PLUS and its and will output what you put into it. • power supply. DO try to place the H‐1500 II PLUS and its power supply away from major sources of RFI and EMI; Connectors though well shielded, the H‐1500 II PLUS units will function best away from large power transformers You may use any good quality contact cleaner and other sources of such interference. recommended for such applications to clean the contacts from time to time, as you deem B. POWER CONNECTIONS appropriate. The H‐1500 II PLUS power supply uses a standard three INITIAL SET‐UP prong male IEC connection for AC input. You need to use a power cord with a female three prong IEC connector at A. LOCATION, LOCATION, LOCATION one end. Like all audio products using tubes, the Allnic Audio The H‐1500 II PLUS power supply connects to the phono H‐1500 II PLUS and its power supply need to be stage itself using the supplied umbilical cable. Connect the placed on a solid stand in a location that provides units to each other using the provided umbilical cable, good air circulation around both the phono stage with the appropriate screw‐on connections to the ... -
Page 7: Outputs
button switch on the front panel of the phono MC cartridge. Each position on the X# scale corresponds stage , while the right hand vertically aligned pair to an increase in gain, indicated on the +#dB scale. You is input 2. should use identical settings for both transformers to avoid channel imbalance. To the left of the four MC RCA input connections is a screw type connector. This connector is the Use a coin or other appropriately shaped object to select ground connection for a ground wire from a the gain factor. We encourage experimentation for each cartridge and/or turntable if you are using a of your favourite moving coil cartridges. moving coil cartridge. To the right of the four MM RCA input connections is another screw type F. A NOTE ON PHASE connector. This connector is the ground connection for a ground wire from a cartridge Phase issues generally will result in lack of bass and/or and/or turntable if you are using a moving magnet focus of the stereo image. You may need to reverse cartridge. connections on your cartridge if you are having phase issues. As is usual in these circumstances, some trial and When you are facing the front of the H‐1500 II PLUS, error experimentation may be required to find the correct the two pairs of MC connections are on the far right position. . Of course, the entire process is simplified if of the unit, with the two MM connections your preamplifier has a phase control, as do the Allnic immediately to their left. Audio L‐1500 and L‐4000 preamplifiers. ... -
Page 8: Operation
in/down “mute” position (see Figure 3). are controlled from the front panel. Of course, BE • CAREFUL about differences in gain between your sources. pressed the button switches on the right Generally, disc players and tuners will have greater gain hand side of the front panel of the phono than phono stages. That means the volume setting for stage to the appropriate positions for the listening to your turntable might be too high for listening cartridge type, either MC or MM, and the to CD’s. input (“1” or “2”) that you will use initially (See Figure 3). The left of the two button When you are finished listening, turn off your power switches is for choosing MM (button amplifier(s); then turn off your preamplifier and then turn pressed in) or MC (button out). The button off the H‐1500 II PLUS last by pressing the on‐off switch on switch on the right is to choose the input the front panel of the power supply so it returns to the for that type of cartridge, either MM or out position. MC. The position for input 1 is with the button pressed down in the low position, In the case of any failure, please contact Hammertone and the position for input 2 is with the Audio for assistance. button pushed to return to the raised position. • TUBES if you are using a moving coil cartridge, set the MC transformer controls on the top of The H‐1500 II PLUS uses the following tubes (please see the chassis to the factor that you will try Figure 6): ... - Page 9 SPECIFICATIONS FOR THE ALLNIC AUDIO H‐ E282F x 2, driver and impedance 1500 II PLUS PHONO STAGE matching (no equivalent). 7233 x 2, series voltage regulator • (similar to CV4079). Inputs: Moving Coil (MC) 6485 x 2, automatic voltage × two (2) pairs regulator (similar to 6AH6, unbalanced (RCA) 6AH6WA, 6AH6S. Moving Magnet (MM) 5AR4 x 1, rectifier ‐ in the x two (2) pairs power supply (same as GZ34). unbalanced (RCA) • • Power Consumption: 70W – 110/120 / 60Hz Ground: Two (2) x screw type terminal • Fuse: AC 2A, 250V • Outputs: One (1) pair x • unbalanced (RCA) Dimensions: ‐ Phono Stage: 430mm (16.9 inches) x 275mm • (10.8 inches) x 118mm (4.65 Frequency (RIAA): 20Hz ~ 20KHz ...
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Page 10: Warranty
WARRANTY All Allnic Audio amplifier and phono stage products, including tubes, are warranted, including parts and labour, for twelve months from date of purchase. Date of purchase is the date indicated on the invoice for the product issued by Hammertone Audio. Subject to applicable laws, warranty is non‐transferable and valid only for original purchaser. For the warranty to be valid, a defective product must be returned to Hammertone Audio for service prior to any unauthorized attempt to repair. Any repair work on an Allnic Audio product not specifically authorized by Hammertone Audio will void the warranty on the product. Figure 1 – H-1500 II PLUS Rear Panel View Figure 2 – H-1500 II PLUS Power Supply Rear Panel View... - Page 11 Figure 3 – H-1500 II PLUS Chassis Top View - MC Transformer Control Figure 4 – H-1500 II PLUS Front Panel View Figure 5 - H-1500 II PLUS Power Supply Front Panel View...
- Page 12 Figure 6 – H-1500 II PLUS Internal View...
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