background image

SHORTEST SIGNAL PATH:

 Gain stages, based upon ultra-low noise differential 

balanced audio amplifiers, are implemented into the shortest signal path of any 
previous Rowland preamplifier. All signal paths are balanced from input to output 
for maximum noise rejection.

DUAL-ZONE PREAMPLIFICATION: 

Separate 2nd gain stage for record outputs offers 

same circuitry as the primary signal path with independent volume control.

TRANSFORMER-COUPLED: 

All inputs and outputs routed through professional 

grade Lundahl transformers for maximum common noise rejection, EMI immunity, 
and cross-component compatibility. Transformer coupling also ensures invariant 
gain for all balanced inputs and outputs. When used with input transformer 
equipped JRDG amplifiers a 140dB dynamic range interface can be achieved. All 
unbalanced inputs convert to balanced upon entering the preamp.

FLEXIBLE CONNECTIVITY: 

6 inputs (4 XLR balanced, 2 RCA unbalanced); 4 main 

outputs (2 XLR balanced, 2 RCA unbalanced); 2 record outputs (1 XLR 
balanced, 1 RCA unbalanced); per channel.

INPUT GAIN OFFSETS: 

Hi resolution independently programmable gain offset on 

each main input ranging from -20dB to +20dB in 0.5dB increments.

OUTPUT OFFSET: 

High-resolution programmable gain offset on 

MAIN UNBALANCED 

OUTPUT 2

 (mapped to 

OUTPUT B

 on the preamplifier back panel) with 0.5dB 

resolution adjustable relative to 

MAIN OUTPUT 1 

(mapped to 

OUTPUT A

 on the 

preamplifier back panel).

UNITY GAIN INPUTS:

 Any main input can be configured as unity gain bypass for 

compatibility with theater processors.

PHASE INVERSION: 

Independent signal phase inversion control on left and right 

channels for optimum speaker setup and system checks.

CHANNEL BALANCE: 

Hi resolution (1.0dB) panning of stereophonic image 

(channel balance) for a m/-20dB shift.

VFD:

 Long life 32x320 pixel custom graphic vacuum fluorescent display (VFD) 

offers maximum resolution of display data for status indication.

 

6

Содержание CRITERION

Страница 1: ...CRITERION STEREO PREAMPLIFIER Operational Manual REV14 2010 Jeff Rowland Design Group 2010 All Rights Reserved...

Страница 2: ...if the supplied 3 wire grounded AC cable ground terminal is defeated or lifted or the unit is connected to a 2 wire ungrounded AC outlet The CRITERION PREAMPLIFIER is designed to perform optimally wit...

Страница 3: ...use for which this preamplifier was designed Please note that your CRITERION PREAMPLIFIER control and amplifier chassis serial numbers begins with the letters PC and PB respectively This serial number...

Страница 4: ...s 20 Internal Switches 20 Remote Transmitter Battery Replacement 21 General Operations 22 Powering on and off 22 Setting Mute 22 Channel Balance 22 Switching Between AC mode and Battery Mode 23 Record...

Страница 5: ...echargeable batteries provide the ultimate clean power source and absolute isolation from the power grid AC power supply is taken offline during DC battery based operations to isolate the CRITERION PR...

Страница 6: ...eamp FLEXIBLE CONNECTIVITY 6 inputs 4 XLR balanced 2 RCA unbalanced 4 main outputs 2 XLR balanced 2 RCA unbalanced 2 record outputs 1 XLR balanced 1 RCA unbalanced per channel INPUT GAIN OFFSETS Hi re...

Страница 7: ...control incorporates a permanently noiseless optical encoder that will always maintain its tactile feel accuracy and channel balance at all settings The volume can be adjusted from 0dB to 99 5dB from...

Страница 8: ...S BEFORE ATTEMPTING TO CLEAN IT THIS WILL PREVENT SMALL SCRATCHES FROM MARRING THE SURFACE BEFORE THE SURFACE COATING HAS HAD A CHANCE TO HARDEN COMPLETELY WARNING THE FRONT PANEL OF THE UNIT SHOULD N...

Страница 9: ...ll of the packing materials If the preamplifier is returned to your dealer or JRDG the original packing materials must be used for shipment to avoid possible damage Neither JRDG nor the shipper can be...

Страница 10: ...le is correctly inserted To remove cables grasp the outer sliding sleeve of each cable between your fingers and pull sliding sleeve and cable away from the chassis connector NOTE DO NOT FORCE CABLE IN...

Страница 11: ...INVERSION INDICATOR the CRITERION PREAMPLIFIER s display features a visible indicator for the phases of both right and left channels on its lower left corner as follows 1 L R the phase for both chann...

Страница 12: ...s is provided in the MENU when the menu function is selected 8 BATTERY CHARGE STATUS An 8 segment gas gauge indicates the approximate battery capacity when operating in battery mode It is fully lit wh...

Страница 13: ...duce the volume by 20 dB Pressing the MUTE button a second time will fully mute the volume Pressing the MUTE button a third time will return the volume to the original unmuted condition Pressing and h...

Страница 14: ...preamplifier circuitry from it s internal AC power supply and discontinues the charging of the batteries Battery operation can also be achieved by pressing the NAVIGATION RIGHT button on the handheld...

Страница 15: ...diamond shape no input offset adjustment has been made This feature is particularly useful for sources that have much higher or much lower output levels than normal Every individual input offset adju...

Страница 16: ...display remains off during normal operation and is temporarily activated for 5 seconds whenever any command is issued through the front panel or the handheld remote transmitter DISPLAY OFF 15s The dis...

Страница 17: ...L CHASSIS SERIAL NUMBER The Control Chassis serial number begins with the letters PC 4 DC OUT R L POWER OUTPUT RECEPTACLES Receptacles send DC power and serial communications data via two supplied DC...

Страница 18: ...ed XLR Two 2 pair Unbalanced RCA input jacks for each channel 3 MAIN 1 MAIN 2 OUTPUTS Two 2 pair Balanced XLR Two 2 pair Unbalanced RCA jacks for Main 1 Main 2 outputs for each channel MAIN 1 and MAIN...

Страница 19: ...ACTIVITY LIGHT IS AN INDICATION THAT THE AA ALKALINE BATTERIES INSIDE THE HANDHELD REMOTE ARE DEPLETED AND NEED TO BE REPLACED The handheld remote transmitter features internal switches for selecting...

Страница 20: ...2 XLR output Press ENTER or EXIT to leave this mode REC OUT VOLUME Pressing either button automatically enters the REC OUT LEVEL menu mode and then adjusts the level of the RECORD outputs XLR RCA Pre...

Страница 21: ...ver unfasten the holding screw located in the bottom end of the transmitter unit Remove the spring loaded cover Remove both AA batteries Orient the remote transmitter with the keypad facing up and wit...

Страница 22: ...20 0 counts The display shows the volume indicator surrounded by corner brackets Pressing MUTE button a second time mutes the main volume completely The volume indicator on the display returns to the...

Страница 23: ...ECORD SELECT from the CRITERION PREAMPLIFIER s menu Press any input button ranging from 1 to 6 on the control panel or on the CRITERION PREAMPLIFIER s remote transmitter to complete the assignment The...

Страница 24: ...s Exit by pressing any of the MENU buttons ADJUSTING OUT 2 OFFSET Enter MENU Scroll and select OUT 2 OFFSET The balance indicator bar temporarily shows the amount of offset Adjust the offset with the...

Страница 25: ...ON ATTEMPTING TO DO SO MAY CAUSE FIRES OR SEVERE DAMAGE TO THE PREAMPLIFIER ANY DAMAGE TO THE CRITERION PREAMPLIFIER RESULTING FROM THE USE OF UNAPPROVED BATTERIES IS NOT COVERED BY THE JRDG WARRANTY...

Страница 26: ...99 5 dB Input Impedance 40k ohms Balanced or Unbalanced Output Impedance 60 ohms Balanced or Unbalanced Inputs 4 pair Balanced XLR 2 pair Unbalanced RCA Outputs 2 pair Balanced XLR 2 pair Unbalanced...

Отзывы: