Hybrid Audio Technologies Unity Series User Manual

Page 6

U51-2

System

U61-2

System

Midbass

Overall Diameter

Φ150 mm

Φ165 mm

Mounting Depth

68 mm

68.8 mm

Bolt Circle Diameter

Φ139 mm

Φ156 mm

Mounting Hole

Φ 123 mm

Φ140 mm

Recommended Minimum Highpass

Crossover Frequency (fourth order)

65 Hz

60 Hz

Continuous Power Handling

(Pnom Rated Power Input • No crossover)

100 watts

(25 watts)

(40 watts)

Peak Power Handling

(Pmax Rated Power Input • No Crossover)

230 watts

(50 watts)

(80 watts)

Recommended Power Range

20-150 watts

Frequency Response (+/- 3dB)

55 Hz - 22 kHz 50 Hz - 22 kHz

60 Hz - 8 kHz

55 Hz - 6.5 kHz

Efficiency 2.83V/1 meter

91.8 dB

93.2 dB

Mms

9.48 g

10.5 g

Cms

416 μM/N

403 μM/N

BL (T*m)

5.5

Voice Coil Diameter

25.5 mm

Nominal Impedance

4 Ω

DC Resistance

3.4 Ω

Fs (Free Air)

80 Hz

75 Hz

Qms

3.227

4.506

Qes

0.553

0.679

Qts

0.472

0.59

Xmax (Two Way)

10mm

12mm

Vas

5.2 L

8.1 L

9.331 mm

11.882 mm

Unity

Component

Systems

Specifications &

Parameters

† Typically, in-car response including vehicular “cabin gain”, or the gain expected

with midbass installed in the vehicle, will result in an extended midbass and

upper subbass response. This is a result of these frequencies being below the

lowest resonance in the vehicle (typically around 50-125 Hz in most vehicles,

described in more detail on page 23). In more practical terms, install the Unity

midbass into your vehicle and you will see a dramatic improvement in midbass

and upper subbass output, much more so than just simply listening to the Unity

in a large room, or worse yet, “free air” (we don’t recommend even trying the

Unity speakers in “free air” without some form of enclosure or infinite baffle for

the midbass).

Thiele/Small Parameter Discussion for Unity Midbass

Speakers

The mechanical and electrical parameters of the Unity midbass speakers

are amenable to a variety of different installations and speaker locations.

The high Qms (Q factor of mechanical system) and Qts (Q factor of total

system), coupled with the driver’s Fs (resonance frequency) allow it to be

used in an “infinite baffle” configuration. In more practical terms, install the

Unity midbass such that the front and back waves don’t “meet” (as detailed

in Section I – Getting Started - Basic System Installation), including in a

door or kick panel, or in the case of a motorcycle, in the fairing (using only

the airspace behind the speaker as a pseudo enclosure), with no need for

a real enclosure or “box.” The design goes hand in hand with fool-proof,

high-end sound quality with minimal work. For more advanced users,

please reference the Thiele/Small Parameters for the Unity-series midbass

drivers.