AS4508M Equivalent & Substitute Parts

Part Overview

The AS4508M is an 8 Ohm general purpose speaker rated at 1 W with a top port configuration, manufactured by PUI Audio, Inc. This speaker operates across a frequency range of 450 Hz to 5 kHz and delivers 84 dB SPL at 1W/1M. The AS4508M is classified as obsolete, making identification of compatible substitute parts essential for ongoing design support and production continuity.

Substiute Parts

AS4508M

PUI Audio, Inc.In Stock: 893AS4508M Datasheet

Current PartRFQ

AS04508MR-3-R

PUI Audio, Inc.In Stock: 1279AS04508MR-3-R Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The AS04508MR-3-R qualifies as a direct substitute for the AS4508M based on the following critical parameters:

• Impedance: Both parts are 8 Ohms, ensuring electrical compatibility in existing circuits
• Rated Power: Both parts are rated at 1 W, maintaining power handling consistency
• Port Location: Both feature top port configuration, supporting identical mechanical mounting
• Shape and Dimensions: Both are round speakers with 1.772" (45.00mm) diameter, ensuring form factor compatibility
• Cone Material: Both use Polyester/PET material
• Magnet Material: Both use N35 magnets
• Termination: Both use solder pads for connection

The AS04508MR-3-R represents an active product with improved compliance status, making it the recommended path for design updates and new production runs.

Parameter Comparison

Engineering Selection Recommendations

The AS04508MR-3-R is the appropriate substitute for the obsolete AS4508M. The substitute maintains electrical compatibility through identical impedance and rated power specifications. Mechanically, both parts share the same form factor, port location, and mounting interface.

The AS04508MR-3-R offers improved regulatory compliance as an active product with ROHS3 certification, whereas the AS4508M is RoHS non-compliant. This compliance advantage makes the AS04508MR-3-R suitable for new designs and production transitions.

Minor parameter variations exist: the AS04508MR-3-R extends the upper frequency range to 6 kHz (versus 5 kHz), reduces maximum power handling to 1.5 W (versus 2 W), and decreases seated height by 0.008" (0.20mm). These differences remain within acceptable tolerances for general purpose speaker applications and do not compromise functional substitution.

Frequently Asked Questions (FAQ)

Q: Can the AS04508MR-3-R replace the AS4508M in existing designs?

A: Yes. Both parts share identical impedance (8 Ohms), rated power (1 W), physical dimensions (45mm diameter), port location (top), and termination method (solder pads). The substitute is mechanically and electrically compatible.

Q: What are the key differences between these parts?

A: The AS04508MR-3-R extends upper frequency response to 6 kHz, reduces maximum power to 1.5 W, and achieves 1 dB lower efficiency (83 dB versus 84 dB SPL). The substitute is 0.008" shorter in seated height. The AS04508MR-3-R is ROHS3 compliant and active, while the AS4508M is obsolete and non-compliant.

Q: Is the 1 dB efficiency difference significant?

A: The 1 dB difference in SPL efficiency is minor for general purpose speaker applications. Both parts operate at the same rated power and impedance, making this variation acceptable for functional equivalence.

Q: What is the impact of the extended frequency range in the substitute?

A: The AS04508MR-3-R extends upper frequency response from 5 kHz to 6 kHz. This provides broader frequency coverage and does not negatively impact compatibility with designs specified for the original 450 Hz to 5 kHz range.

Q: Are there packaging differences?

A: The AS4508M uses standard packaging, while the AS04508MR-3-R is supplied in Box packaging. This does not affect component functionality or electrical performance.

Q: Should I transition to the AS04508MR-3-R for new designs?

A: Yes. The AS04508MR-3-R is an active product with current manufacturer support and ROHS3 compliance. The AS4508M is obsolete and should not be specified for new designs.