Peerless_HDS134_850489.pdf

850489

4.5" PHASE PLUG - HDS134

WOOFER/MID 6½" - HDS 182 - 182 WR 33 102 SD AL PH LS 8 ohm

A High End mid-woofer with a rigid aerodynamic cast aluminium basket profile and a ventilated spider.

The static phase plug eliminates air compression between the dust cap and the magnet assembly.

This phase plug feature also gives the driver a very low distortion magnet system and with the aluminium shortening

ring and copper capped pole piece, both contribute as heatsinks for the large 26mm voice coil, reducing power

compression and give a more linear flux field for the voice coil to work in thus increasing this drivers performance to

optimum levels. The three or five layer sandwich cone improves accuracy and consistency of sound reproduction over

the entire frequency range, creating a more "musical" driver. The double bonded cone, cap and coil assembly ensures

that the speaker cone will respond to every coil movement in a way never achieved before, reducing cone break-up,

increasing response, and performance especially at high volume levels. This premium mid-woofer uses an abundance of

Peerless' experience and resources to produce an exceptionally refined driver.

Peerless recommend a ported box volume of between 15 to 25 litres and parallel configurations for larger boxes

Peerless recommend a ported box volume of between 15 to 25 litres and parallel configurations for larger boxes.

F(ratio) for this driver is t .

25 ltr box. 1 port. Diameter 70 mm. Length 145 mm. Tuning freq 45 Hz. Response, - 3 dB app. at 48 Hz.

25 ltr box. 1 port. Diameter 55 mm. Length 80 mm. Tuning freq 45 Hz. Response, - 3 dB app. at 48 Hz.

15 ltr box. 1 port. Diameter 55 mm. Length 110 mm. Tuning freq 52 Hz. Response, - 3 dB app. at 55 Hz.

15 ltr box. 1 port. Diameter 40 mm. Length 50 mm. Tuning freq 52 Hz . Response, - 3 dB app. at 55 Hz.

102, and he driver is very suitable for vented boxes

Parameters

Free Air Common Baffled

Nominal impedance

(ohm)

Minimum impedance/at freq. Zmin (ohm/Hz)

8.6/335

Maximum impedance

(ohm)

42.9

DC resistance

(ohm)

5.8

Voice coil inductance

(mH)

1.0

Capacitor in series with 8 ohm

(for impedance compensation)

(µF)

Resonance Frequency

(Hz)

53.2

52.2

Mechanical Q factor

Qms

2.83

2.88

Electrical Q factor

Qes

0.44

0.45

Total Q factor

Qts

0.38

0.39

F (Ratio fs/Qts)

(Hz)

133

Mechanical resistance

Rms (Kg/s)

1.23

Moving mass

Mms (g)

10.4

10.8

Suspension compliance

Cms (mm/N)

0.86

Effective cone diameter

(cm)

10.5

Effective piston area

(cm²)

Equivalent volume

VAS (ltrs)

8.8

Force factor

(N/A)

6.8

Reference voltage sensitivity

Re 2.83V 1m at 259 Hz (Measured) (dB)

87.9

Voice coil diameter

(mm)

Voice coil length

(mm)

Voice coil layers

Height of the gap

(mm)

Diameter of magnet

(mm)

Height of magnet

(mm)

Weight of magnet

(kg)

0.4

Code

850489

HDS - HIGH DEFINITION SOUND

A new class of mid-bass drivers from Peerless.

By introducing the High Definition Sound (HDS) class, Peerless has pushed the performance limits of mid-bass drive units. The main applications for

the range are demanding two and three way box systems where the visual and sonic performance must be second to none. In the design the emphasis

has been put in to achieve long time reliability and very low distortion combined with soft clipping and astounding bass performance for the size.

A. Aluminum Phase Plug

The aluminum spacer eliminates compression under the dust cap and serves as heat sink for the coil to reduce power compression.

The 1 inch voice coil is long in a narrow gap to ensure sustained BL over long excursions.

C. 15mm Magnet System

The magnet is higher than normal magnets used in conventional speakers to avoid bottoming of the coil to the pole piece and increase the max SPL.

D. Distortion Reduced Motor

A long 2 layer voice coil normally results in high self induction and impedance varying with excursion. Its many ampere-turns react on the magnetic

field in the air gap. These two main factors causing motor distortion in mid-bass drivers are practically eliminated by the combined impact of the

Aluminum Short Circuiting Ring (D) and the Aluminum Phase Plug (A) on the pole piece. At the same time they both contribute as heat sinks for the

voice coil, reducing power compression. The result is unbelievable clean bass reproduction.

With Peerless new design we have two bonds on the dustcap and cone assembly. This way the dustcap and cone will respond to every coil movement

in a way never seen before.

The progressive suspension is designed in house to achieve soft clipping and low distortion even under extreme load.

G. Rubber Surround

The surround is made from SBR rubber because of the wide operating temperature, low creep and long term reliability.

H. Laminated Sandwich Cone

The cone is constructed from a propriety cone material using a laminate of different polypropylene films and adhesives.

This creates a stiff but still dampened cone that will remain stable even under very large sound pressures.

I. Rigid Cast Aluminum Basket

The attractive rigid cast basket with an aerodynamic profile provides the necessary sturdy base for the magnet structure and suspension and allows for

the long excursion of the cone. The spider is ventilated to achieve the lowest possible compression and allowing air to flow freely to create a cooling

effect for the voice coil. The design of the basket front allows for very slim box designs and the edges are chamfered to reduce the necessary amount

of countersinking.

Projected

On-Axis / 30 Off / 60 Off

B. Long Voice Coil

E. Double Bonded Dustcap

F. Progressive Spider

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