JBL Balboa SUB10, Service Manual

JBL Venue Sub10  150W Powered Sub/ Plate Amp 

LINE VOLTAGE

Yes/No

Hi/Lo Line

Unit

Notes

US 120vac/60Hz

Yes

108-132

Vrms

Normal Operation

EU 230vac/50-60Hz

Yes

207-264

Vrms

Normal operation, MOMS required

 Asia 100vac/50Hz

Yes

90-110

Vrms

Normal Operation

Parameter

Specification

Unit

QA Test Limits

Conditions

Notes

Amp Section

Type (Class AB, D, other)

D

D 

n/a

Load Impedance (speaker)

4

Ohms

n/a

Nominal

Rated Output Power

150

Watts

145

1 input driven

THD@ Rated Power

0.08

%

1.5

22K filter

THD @ 1 Watt

0.1

%

0.5

22K filter

DC Offset

10

mV-DC

20

@ Speaker Output

Damping factor

>100

N/A

15

50Hz, 4 Ohms load 

Measured at amplifier board speaker output 

terminals @ 135 Watts 

Input Sensitivity

Input Frequency

50

Hz

50

Nominal Freq.

1 input driven, AP Zo=600 Ohms

Line Input (L&R)

13

mVrms

±2dB

To 1 W

1 input driven, AP Zo=600 Ohms

LFE Input

8

mVrms

±2dB

To 1 W

LFE input driven only, AP Zo=600 Ohms

Speaker/Hi Level Input

110

mVrms

±2dB

To 1 W

(Approx -20 dB below Line In)...1 input 

driven

Signal to Noise

SNR-A-Weighted

100

dBA

85

rel. to rated power

A-Weighting filter

SNR-unweighted

90

dBr

80

rel. to rated power

22K filter

SNR @ 1W-unweighted

60

dBr

55

rel. to 1W Output

22K filter

Residual Noise Floor

1

mVrms

2

Volume @max, using RMS reading 

DMM/VOM (or A/P)

Residual Noise Floor

1

mVrms(max)

2

Volume @max, w/ A/P Swept Bandpass 

Measurement (Line freq.+ harmonics)

Input Impedance

Line input L&R , LFE

>15

K ohms

n/a

Nominal

Speaker/Hi Level Input

4.7

K ohms

n/a

Nominal

Filters

Left & Right inputs LP

Hz

--

±2dB

2nd order fix and 2nd order variable

Slope & Q

4th dB/Octave

n/a

LFE Low Pass fixed

Hz

--

±2dB

Slope & Q

2nd dB/Octave

n/a

Subsonic filter (HPF)

Hz

--

±2dB

Slope & Q

5th dB/Octave

n/a

Limiter

 (yes/no)

YES

--

n/a

Features

LFE Input

YES

functional 

BW Limited to 500 Hz

Phase Switch (yes/no)

YES

--

functional 

Volume pot Taper (lin/log)

LOG

--

functional 

ATO switch (AUTO/ON)

YES

functional 

Input Configuration

Line In (L,R)

L ,R

--

functional

RCA inputs: L and R

Line level in LFE

LFE

functional

Spkr/Hi Level In

(L,R)

L,R

--

functional

L & R inputs, binding post connectors

Spkr Out: Level out (L,R)

L,R

functional

Only applies to 230V model

Signal Sensing (ATO)

ATO test Frequency

50

Hz

ATO Line Level

2

mV

functional

2mV@50Hz into Line Input w/ 1 ch. 

driven

ATO Speaker level input

25

mV

functional

50mV@50Hz into Line Input w/ 1 ch. 

driven

ATO Turn-on time

5

ms

functional

Amp connected and AC on, then input 

signal applied

Auto Mute/ Turn-OFF Time

15

minutes

functional

T before muting, after signal is removed Auto turn of time (T) must be  10 > T <15

SUB10 

Venture Series 

3