LH500 LH1000 500 & 1000 WATT BASS AMPLIFIERS Owner's Manual
Safety Instructions/Consignes de sécurité/Sicherheitsvorkehrungen/Instrucciones de seguridad WARNING: To reduce the risk of fire or electric shock, do not expose this unit to rain or moisture. To reduce the hazard of electrical shock, do not remove cover or back. No user serviceable parts inside. Please refer all servicing to qualified personnel.
Table of Contents Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Guided Tour - Model LH500 and LH1000 Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction Congratulations on purchasing the Hartke LH Series Bass Amplifier! Although these amplifiers have been designed for easy operation, we suggest you first take some time to go through these pages so you can fully understand how we’ve implemented a number of unique features. This manual covers both LH Series models, the LH500 and LH1000. The model LH500 produces 350 watts when connected to a speaker system with an 8-ohm load, and 500 watts when connected to a speaker system with a 4-ohm load.
Features The Hartke Model LH500 and LH1000 bass amplifiers offer classic tone with all the newest concepts in bass amplification design. Here are some of their main features: • • ower to spare — The Model LH1000, a full 1000 watts delivered to a 4 ohm speaker system or 500 watts to an 8 P oh m speaker system. The model LH500 delivers 500 watts to a 4 ohm speaker or 350 watts to a 8 ohm speaker. Classic 12AX7 tube high-voltage preamp circuit provides great tone.
Guided Tour - Model LH500 and LH1000 Front Panel 1 2 3 4 5 6 7 8 9 13 10 11 14 1 12 15 1. Handle – Two convenient metal handles make the amplifier easy to transport and easy to position while mounting in an equipment rack. 2. PASSIVE Input jack - If your bass guitar has passive circuitry, connect it to the Model LH500 and LH1000 here. This standard, 1/4” unbalanced jack provides a high impedance (100 k Ohms) input sensitivity of 20 millivolts. 3.
Guided Tour - Model LH500 and LH1000 Front Panel 9. LIMITER LED – The indicator light will illuminate when the LIMITER switch is engaged. 10 BALANCE control knob (LH1000 only) – This control knob adjusts the level difference between the Channel 1 and Channel 2 amplifiers. If you are using two different cabinets (for example a 115 and 410), you may want to drive one a little harder than the other to balance your sound. In the center (12:00 o’clock) position, both amplifier channels are at equal power.
Guided Tour - Model LH1000 Rear Panel 1 10 2 3 4 5 6 7 8 9 1. AC Voltage selection switch – This switch is used to set the LH Series operation voltage. Be sure to check that the switch is set correctly for your country. 2. EFFECTS SEND jack - Use this 1/4” unbalanced jack to send low impedance (100 ohm) signal from the Model LH1000 to a professional outboard effects processor such as a reverb, echo, chorus, flanger, or harmonizer device.
Guided Tour - LH500 Rear Panel 1 7 2 3 4 5 6 1. AC Voltage selection switch – This switch is used to set the LH Series operation voltage. Be sure to check that the switch is set correctly for your country. 2. EFFECTS SEND jack - Use this 1/4” unbalanced jack to send low impedance (100 ohm) signals from the Model LH500 to a professional outboard effects processor such as a reverb, echo, chorus, flanger, or harmonizer device.
Setting Up and Using the Model LH500 and LH1000 Setting up your Hartke Systems LH Series Bass Amplifier is a simple procedure which takes only a few minutes: 1. Remove all packing materials (save them in case of need for future service) and decide where the amplifier is to be physically placed. To avoid potential overheating problems, be sure that the rear panel is unobstructed and that there is good ventilation around the entire unit, particularly behind the rearpanel fan. Model LH500 Model LH1000 2.
Setting Up and Using The Model LH500 and LH1000 5. Press the front panel Power switch in order to turn on the amplifier. After approximately 20 seconds, you’ll hear a click, indicating that the relay protection circuitry has completed cycling and that power to the system has been provided. 6. Set the output of your bass to maximum and then, while playing, slowly turn the VOLUME control up until the desired level is achieved.
About Equalization The Hartke LH Series Bass Amplifier gives you enormous control over shaping the sound of your bass, using a process called equalization. To understand how this works, it’s important to know that every naturally occurring sound consists of a broad range of pitches, or frequencies, combined together in a unique way. This blend is what gives every sound its distinctive tonal color.
About Equalization The specific EQ you will apply to your bass signal is very much dependent upon your particular instrument and personal taste and playing style. However, here are a few general suggestions: • For that super-deep reggae or Motown sound, boost the Bass EQ slightly while attenuating the MID and Treble EQ. • To remove boxiness and make your instrument sound more “hi-fi,” try attenuating the Mid EQ control. • For a twangy, cutting sound, try boosting the Treble EQ.
Using LH1000’s BRIDGE and Dual Parallel Modes The LH1000 amplifier is constructed using two 500 watt power cores. Depending in the position of the BRIDGE mode switch, the amplifier can run in Dual Parallel mode, or Bridge mode. In Dual Parallel (BRIDGE mode switch to the left), the two amplifier channels are receiving the same input signal from the pre amp, but are operating separately, so each channel sees its own speaker load.
Using the Direct Output The LH500 and LH1000 both feature a front panel DIRECT OUTPUT connector used for interfacing to external recording and PA gear. This standard, balanced XLR connector provides a Line-level pre-EQ and pre-VOLUME output signal from the LH Series amplifier. You’ll usually use this to connect the LH Series signal to a Mic-level input when interfacing with PA systems or recording mixing consoles.
Cleaning the Fan Filters Cleaning the Fan Filters From time to time, it may become necessary to clean the fan filter. It’s a good idea to keep the fan filter clean to ensure maximum airflow, and cooling, through your LH Series amplifier. To clean the fan filters, follow these simple steps: 1/ Remove the fan filter by placing your finger in the depressed area under the fan filter frame. 2/ Clean the filter with warm water and let the filter dry thoroughly before replacing.
Specifications Input Sensitivity Passive Input Active Input 100 k Ohms, 20 mv. 100 k Ohms, 60 mv. Rated Output Power LH500 500 watts @ 4 ohms, 350 watts @ 8 ohms LH1000 Dual Parallel mode 2 x 225 watts @ 8 ohms , 2 x 320 watts @ 4 ohms, 2 x 545 watts @ 2 ohms Bridge mode 1 x 750 watts @ 8 ohms , 1 x 1100 watts @ 4 ohm Total Harmonic Distortion less than .5% Signal To Noise Ratio approx.
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Hartke 45 Gilpin Avenue Hauppauge, New York 11788-8816 Phone: 1-800-3-SAMSON (1-800-372-6766) Fax: 631-784-2201 www.hartke.
