Bag End QUARTZ-I Specifications

ACOUSTIC AND ELECTRICAL

Enclosure:

18 mm 13-ply birch plywood

Low Frequency Transducers:

4 - 18" INFRA cone
3" Voice coil
120 oz. Magnet

Input Connectors:

2 - Connector plates with:
Dual Banana and Neutrik
Speakon
Custom connector
configurations available

Grille:

14 Gauge black powder
coated perforated steel in an
extruded aluminum frame with
weather seal

Standard Hardware:

16 - Machined aluminum
speaker mounting clamps

Optional Hardware:

Rigging points

SYSTEM COMPONENTS

PHYSICAL

Recommended Crossover
Frequency:

80 Hz

Frequency Response:

20 Hz to 65 Hz ±2 dB

(2π Steradians, with

8 Hertz Integrator)

Sensitivity:

99 dB SPL @ 45 Hz (1W @ 1m)
(for additional information, see
INFRA Speaker Sensitivity
Technical Note)

Power Handling:

1600 W continuous program

Finish:

Black textured lacquer

Dimensions:

40"h x 30"w x 31"d
102 cm x 76 cm x 79 cm
Trapezoidal, 6

0

taper per side

Weight:

224 lbs.
102 kg

Shipping Dimensions:

45" x 35" x 39"
115 cm x 89 cm x 99 cm

Shipping Weight:

276 lbs.
126 kg

BAG END

SPECIFICATIONS

QUARTZ-I

APPLICATIONS:

Concert PA systems

Auditorium Reinforcement

Discotheque Subwoofer

Cinema Subwoofer

QUARTZ-I The QUARTZ-I is a very high output concert INFRA
subwoofer system designed to minimize the space required to
obtain extremely high level and high fidelity low frequency output.
The QUARTZ-I provides perfectly flat response below 20 Hz when
used in conjunction with the INFRA Integrator.

ABOUT INFRASUB TECHNOLOGY

Almost all specifications for
subwoofer systems are fixated on the frequency response
domain. However, the impression of power and quality is equally
related to the time domain performance of a system. Because
of the long wavelengths of low frequencies, this is particularly
true with subwoofers.

Likewise, the maximum SPL is not a very reliable way to judge
the impact of a subwoofer. A poor time domain performer will
not have the same impact or natural sound as a Time-Aligned™
INFRA system.

The reason that INFRA technology sounds dramatically better
than the others is because of their superior time domain
performance. The INFRA subwoofer maintains the bass energy
in a tight packet, aligned with the upper range signal, providing
a greater body impact and a seamless musical connection with
the main loudspeakers.

Conventional sub designs perform so poorly in the time domain
because designers have used methods that sacrifice the phase
response for more control over the frequency response (e.g.,
steep low pass filter slopes, vented speaker enclosures, and
narrow bandwidth systems). With the INFRA technique, we do
not degrade the phase response while extending the frequency
response.

While the INFRA Dual Integrator does function as the system
crossover, it does so without using a low pass filter. Adding a
low pass filter, analog or digital, will have a degrading effect on
the time domain performance of the INFRA subwoofer. A low
pass filter adds signal delay to the sound which varies with
frequency. Also, narrowing the pass band increases the
influence of the rolloff on both ends of the subwoofer spectrum.
The result is the smearing of the arrival times of the low
frequency sound components, changing the timbre and
downgrading the impact of transient sounds.

The Bag End INFRA subwoofers are designed as no­compromise, high fidelity reproduction systems. We believe they
are the finest subs available, regardless of price.

BAG END Loudspeakers

22272 Pepper Road

Barrington, Illinois

60010 USA

Voice 847 382 4550

Fax [phone]

www.bagend.com

Infrasub™ and BAG END®are trademarks of Modular Sound Systems, Inc. Time-Align®, Time-AlignedTM, Time-AlignmentTMare trademarks of E.M. Long Associates.

System Type:

Infrasub 4 - sealed chambers
(3 ft

3

each)

Impedance:

4 Ω each input

Crossover Network:

Requires INFRA Integrator

QUARTZ-I

SSCCRREEWW

#8 x 1/2"
PHIL PH SMS
Z-100 (16)

DDRRIIVVEERR
EL-18A (4)

GGAASSKKEETT TTAAPPEE
Z-516

GGAASSKKEETT TTAAPPEE
Z-516

JJAACCKKPPLLAATTEE
AASSSSEEMMBBLLYY
Z-312 (2)

SYSTEM SCHEMATIC

NNOOTT SSHHOOWWNN::

SHIPPING SLEEVE Z-635 (2)
SHIPPING CRATE SET Z-636 (1)

BBOOLLTT

5/16"-18 x 1 1/2"
SOCKET HEAD CAP SS
Z-105 (16)

SSPPEEAAKKEERR MMOOUUNNTTIINNGG
CCLLAAMMPP

Z-208 (16)

GGRRIILLLLEE

BLACK
POWDER COATED
STEEL CTG-1

BBOOLLTT

1/4"-20 x 2"
PHIL RND HD SS
Z-126 (8)

LLOOGGOO
Z-300

RRUUBBBBEERR SSEEAALL
1/4" x 8.25´
Z-515

BAG END Loudspeakers 22272 Pepper Road Barrington, Illinois 60010 USA Phone [phone] Fax [phone]

BANANA JACK

HIGH

+ RED

+ RED

LOW

HIGH

LOW

- BLACK

+ RED

- BLACK

- BLACK

+ RED

- BLACK

DRIVER

DRIVER

DRIVER

DRIVER

NEUTRIK SPEAKON NL4MP

BANANA JACK

BANANA JACK

BANANA JACK

The Neutrik Speakon NL4MP connector is a keyed, high current, four conductor device which allows both the high and low frequency
signals for a bi-amped loudspeaker system to run through the same multi-conductor cable. Note that all four conductors on both
connectors are wired in parallel, but only two conductors are connected to the drivers in the enclosure. This permits an easy
parallel connection to other similar loudspeakers (if your amplifier can handle the low impedance load!) and allows the use of a
short “jumper” to connect to the mid/high speakers in a bi-amped system. Banana jacks are also provided on each circuit.

The Quartz has 2 input jackplates, each circuit with an impedance of 4 ohms, each powering 2 parallel 8 ohm drivers.